Air receiving and directing means for rotary fans



L. L. HAAs June 16, 1931.

AIR RECEIVING AND DIRECTI'NG MEANS FOR ROTARY FANS Filed June 7, 1926 2 Sheets-,Sheet l III June y16, 1931.

l.. HAAs A'IR RECEIVING AND DIRECTING MANS FOR ROTARY FANS i 2 Sheets-Sheet 2 Filed June "fI 1926 Lncrnn nanas, or

' 25 Fig. [l is a side Velevationo Patented June *1.6, .1931

An'nnenrvinsnnn mnncmrnennnns ronnoTAnY' rANs pplication niet. Iune 7,

`rihis invention relates to rair* directingV means of the kind adaptedftoreoeive air 'from' a fan which propels Vairin thegeneralVv direc-` l tion or its axis for jdireoting'the air wher-p` ever 1t may be useful; for example7 for eithery heatingor` cooling a vehicle. Y

The objects of his invention uare to prof-p;

vide an `air -receiving andV directing device Y adapted to be used in connection WithV afan @te adapted yto propel airin ,the general direction of its axisto eiiiciently deliecttheair to form a strong blast; also to providemeansofnovel construction for using a blast Oie air for heating a motor vehicle also to provide' me vi5 improved construction for using "a blast 'off air Jfor cooling a motor vehicle or parts 'ther'ef of; also to providea valve; of improvedconstruction for either' admitting enr/rent"y ofv p Warmk air into the 'interior vof an ,automobile. 2.0 or' for causing thesameto'beYdischargedzoutQ side of'thebo'dy of the; automobile; jals'o't' improve'the construction of devieeslof this 4 kind in otherk respectshereinaftenspecified; In theaccomp'anlng drawingsf,"

. in apparatus orfdevice embodying*my;in-V

vention, 'showingfthe same appliedto anfinternalcombustiOIlfengin'e and showing means for passing an aire blast around ythey exhaust pipe of the internal eombustionengine for] 1 l the tvvo-fold purpose of providing heated air` ywhich mayf-be usedfo bile and vfor coolingV the exhaust pipe., p. y

. Fig. 2 is a transverse section. ofaithe' exhaust pipe and its Covering, on angenlarged scale on line 2&2, Fig.1.- Figi is an enlarged7 secti charged outside; of'ithefautomobile body.`

f rigs isa ofcan automobile cooling fan: i

50 Fig. `7 isa side'elevationthereof.l i

ry an air direct? heatingtheA antonio#y i y p I mg systems, which air directing means loon-k onalfelevationV of p the valve memberorfadmitting kr.the` warme'dffair into the interior oftherautof mobile or yfor causing thesame to be dis# Y rear vievvo anfair receiving and"r directing member"V embodying invention" showing thefrelationof the same'to the rblades A' rearwardly from 192e. serialv No. 114,272.

,FiggSlis agsectionall viewjthereof` on line Sesma@ f f vFig. 9 is a; central, sectional vieivpther'eof. g

UEFALo/NEW Avom; yAsrsrelxioni'ro BUFFAL rnnssnnsrnnn COMPANY; m0orBUFFALQNEWXORK Y A representsan. internal combustionen?,v

gine ,han/'ing an vrexhff'iust manifoldl Lfromfv which the exihaust'gasesjare conductedrto an exhausty pipe ByWhioh `entends from the(l engme'to the rearfof the lvehiole and termi-ry ynates ina"'inuiiler b. Crepresents the usuali radiator throughy which.r the cooling liquid offthegenginepasses togive up a part. ovfi'ts; e

,heat to the air passing through the radiator,

and Drepresents the usual cooling `fan placed invr rear of ythe radiatorfor thepurpose of assisting in `drawing airlthrough the radi-y ator n from :thejfronti tofv theV rear pthereof. n

These; coolingy fans `Commonly used in conm neetio'n withinternal combustion engines include a 'plurality of inclined and somewhat curved bla'desdgwhich are arranged atfsuchVV afpitoh as to 'drawthe air rearwardly through ,Y

the radiatori' in the general 'direction ofl fthe"1 airis of the famandbecause oftheir pitch and.

rapid rotary motion, someof the air acted upon byntheffan, is alsojgiven a radial nf`1`ove-y kment bythelbl'a'des of the fang All of these parts have heretofore been comnfionlT em-1 ployedQincoonneetion Withinternal combus- Y tion enginesand ofrthemswelves constitute no 1 part 'of this invention.

' le'r'etofore ai* lree Y employed in connection with automobile heat-- sisted merely of a funnel or funnel shapedk member arranged in" rear ofthe cooling fanv for directing theair to some suitabl'epassagelrv for 'n heating 'the air land y then transmitting These funnel shaped airgreceiving meinbe'rs. however,y have been Vfound to be veryineliicien't and produce ifo Y through a pipe, which' is `not sufficient in .Cold Weather to' raise the temperature diseharged radially thl ting means have been f the,l same fintothe interior 'ofv` an automobile, A

nlygaffeeble; current of `air .oanA auto mobilefsuioiently to make 'the interiorbi-th'e` f' automobile comfortable for the occupants.

' The air` 'directing and receiving member 'I chargedV from, and for so directing the two currents of air that they act in conjunction with each other and thus produce a strong blast of air, Which when heated by waste heat from the engine exhaust manifold or from the exhaust pipe, is capable of effectively heating the interior of an automobile in extremely cold weather. It is not, however, intended to limit the invention to the use of this air for heating an automobile since obviously the air canr be used for other purposes, and in fact 1s also c shown in the accompanying drawings as used for cooling the interior of an automobile during Warm weather by carrying away the heat of the exhaust pipe. The air receiving and directing member may be used in connection with any fan adapted to direct air in a direction substantially parallel to its axis of rotation and it is not intended to limit this member for use in connection with cooling fans for internal combustion engines.

E represents generally my air receiving and directing member which is provided with a restricted air discharge passage or neck 10 and an enlarged or flaring part, the open air receiving end of mouth of which is arranged adjacent to outer portions of the fan blades. 'Die enlarged l or flaring portion of the air receiving device includes a part 1l arranged in the rear of the path ofk movement of the outer rtions of the fan blades d, the largest end o the Haring portion being arranged in proximity to the rear faces or edges of the fan blades. This flaring portion l1 tapers rearwardly toward the reduced neck portion 10 through which the air is discharged from theair directing and receiving member. The

air directing and receiving member also includ'es a forwardly extending part or projection 12, which projects forwardly beyond the front edge of the part 11 and around the peripheral portions as to receivethe air discharged radially or tangentially from the ends of the fan blades. This forwardly projecting portion 12 of the air receiving member preferably extends approximately up to or beyond the front edges of the fan blades, and bulges laterally as shown at 13 to form a deflect-ing or guiding pocket for the air discharged from the ends of the fan blades, this pocket preferably also tapering toward the reduced discharge end 10 of the air receiving device.

The air discharged from the fan blades d also flows more lor less in the direction of rotation of the fan blades and consequently Vthe air receiving and directing device E is so arranged that the flaring portions 11 and 13 thereof extendin the general direction ofthe resultant of the flow of air discharged from the fan. Consequently by means of the construction shown, the air receiving and dir- .tributing device takes airfrom the rear asy well as om the sides ofthe fan blades and brings together the air flowing in different of the blades of the fan so directions and deiiects the same into the general or resultant direction of movement of the air from the fan at the portions thereof where the air receiving device is located, so that the flow of air from these various portions of the fan is directed toward the neck or reduced portion 10 of the air receiving device and forms a strong blast, duelargely to the fact that the flaring portion of the air receiving device or member'is shaped to receive eiiciently all the air discharged from the portion of the fan at which the device is located, and that this air is so guided or deflected in the receiving member that no radical or abrupt vchange is made in the flow of the air in passing to the neck 10 of the air receiving device.

ranged` so as to utilize the resultant velocity of the axial iiow throughrthe fan and radial flow due to the centrifugal action, by receiving the air in the direction of its flow and guiding it with a minimum friction to the neck portion or outlet 10 of the airrcceiving device. Y

The air receiving device may be provided, if desired, with a valve for causing the air to be discharged directly to the atmosphere instead of to the neck or discharge passage 10. In the construction shown for this purposey a substantially circular disk valve' 1G is provided Which is secured to a rod or shaft 17 journalled on a part ofthe air receiving device E, and the valve is adapted to be swung in the directionof the arrows shown in Fig. 9 into a position in which the valve'l closes the discharge opening 10 of the air receiving device. On the exterior of the air` receiving device therod or shaft 17 may be provided with an extension or arm '18 connected to a link 19 for shifting the position of the valve, andl a spring 20 is connected to the arm 18 in such a manner that the spring tends to hold the valve either in itsy open or shut position, the arm 18 being at one side of its dead center position with reference to the spring and the pivot-ed rod or shaft 17 ywhen the valve is closed and at the other side of the dead center position when the valve is open. Other means for controlling the dischar e of air from'the air receiving employed, if desired.

My improved air receiving and directing device has been found to be very eilicient when used in connection with the an automobile, and if desired for this purpose, the-airrecei-ving device may be connectcd with a jacket or tube' vF extending around theexterior of the exhaust pipe B or other heated part of an engine, the tube Aor jacket F beingy provided at its air receiving end with a connection 22 to which the air receiving member Eniay be secured in any suitable or desired manner, for example, by

device may e heating ofy t able heat insulating medium 29. The

and engages vthe neck jacket-F mayalso be provided with' asi'iitable hole or aperture 24 through whchfthgexi. 5 liaust pipe B passes,i i f f The jacket- F may be oi any suitable or d@ sired construction, consisting eithergfoic a single thickness'y ot nietalgpr,` iffdesire'd,

jacket may be constructed as shown in Fig. 2 including inner andjouter tubular walls ory shells 26 and 27, preferably made of sheet inetal,` the two jackets being spaced/apart and providing ain annular space 2S for a suitjackets may also be providedwith anuinber A oi int-e-k gral depressed portioiis() extending' niore orf less helically orspirallypartly around vari-- ous` portions ofthe jacket and thus forming guides or vanes which direct the flow otair more or less spirally around the space 'between the j acketand the exhaust pipe BYto-as- A it desired, the j acket maybe'arrangedaround n, the vexhaust manifoldor other heated inein- 'n vthe exhaust pipe.

which has flange which may be suitablybolted to the surel a uniform heating oi' the' air andeorre-` spending absorption offbeat roin'the er;- hraust pipe dueto theY passage of theair throughthe Vspace also servetol correctly position tliejacketon the exhaust pipe.V Therear' end of the jacket niay beprovided with anysuitable'cap or securing the same inv suitable construction maybe providedand,

ber.-'V

Any suitable valveinay the t flow oitV hot -air 'into providedfwithfmeans discharging the' warniair to the the car when Vthe air is not vrequired for heating the interior of the car. ln the'particular construction shown to an air inlet passage', or connection 34 arranged at the lower end of arlowervalve housing 35, a set screw 36 being preferably employed to hold the pipe 33`aiidv'alve housing 35 in correct relation to each other. The lowervalve housing 'includes an annular wall 38 and which in turnfis connect-ed to an annularwall 'et an upper valve housing 39 an annular outwardly extending `floor of the car. The upper valve housing 39 is provided at its upper 'ace with-an annular shoulder 4l'which'forms a bearing .orV Y j v v y j into the:V nteriorfofithe carV or for permitting `f` Y V l fseat for a corresponding shouldered portion portion' 10 of the air receiving device. Thereceiving end :22 oi the the y between thefjacket and These depressed` portions f this kinds@ be prr'ivi'ded at` the Y discharge end -o the pipeSB fior 'controlling thejinteriorfo ther automobile, and preferably thisvalve alsof' tor autoinatically"open: ing or uncovering discharge openingsffor? exterior of' the f upper or dischargeV end of the airv discharge pipe 33 is.,k secured other haiidihenthe tion to permit the/discharge o warmgatinto hiole.' l-ffItA will onk the4` lower 'end ofa perforated register or' dome 42. provided withvr a plurality ot openings 43 through whichthe hot air may be discharged-to theinterior of the car: This dome 3 niay`,oiiV course, be replaced` by a substantially iiat perforated plate, 'i'.`"clesired, and inthe construction' shown is provided with ahandle portion' or proj nieniber 42. v

The 'control ol the krtio-w oi' air is preferablyection 44` which facilitates the turning of 'the perforated air discharge eiected-'by means of advalve 47 which'is pro vided with a central hub portion 48 connected by'ineans ofa rod or shaft 49 with the perte# rated air 'discharge member zor dome 42, so that the rotation ofthe air discharge member 42 effects a eorrespondii'ig rotation of the rvvalve 47 'lliisvalv'eT is provided atiits upy per face Awith a seriesofsectorvshaped' open-Y- ings 50" adapted to registerKV with 'correspond ing openings' 5l yformed in a webZ-o the upper valve housingj39'. The air discharge vopenings '510i the'stationary `web 52 are ar? ranged alternately with corresponding "iinperforate portions 33,iasis` usual in valves of j that when the openings `50 inthe valve member 47 are arranged in registration with the iinperforate portions 5850i the stall tionaiyfweb 52,'the discharge offair into the interior of thevehicle is prevented. A screw or1plug54 secured to apart of thetixed valve inento'f the kvalve 47 Tin either direction. "f y The valve inemb r 47-is also provided-with arv plurality y'of downwardly extending seg-` mental llange'lfportions 55y which are adapted to move along' the interior surface of the an.

memberor' plate 52 klimits the turning move-lVY nularjwallfSS of thelower housingfpof thek air discharge tdevise; This annular wallf'is provided at intervals with openings 57 which," are so arrangedrelatively to the downwardly' ofthe valvev andthefstationary plate that j,

whenthefv'alve member 47 iis put intoa"p'josni-` i tion tojprevent the dS'Cliarge ot'hotfaiij' into the interior of thevehiole, the openings 57 'of the annular "ll BVS'vwillbe uncovered by the downwardly lprojeeting ftlange l portion 5510i d'projecting'flange'portioiis of thevalve o, and to' the openings and" lrespectively theweliicleso that the yhot airjdischarged through `'these 7 .openings s, discharges :beneath l the lo'or'of the vehicle where itiwi'll not alect.. i they temperature ofi' the interior of'zthe' ve? .be obvious; of Veoursegtliat other f means for controlling L'the flow foifzair.;

the air to be discharged exteriorly of the car may be provided, if desired.

As the result of this construction the air directing device may be used for heating the f interior of the car when the valve member 47 is set to permit the discharge of hot air into the interior of the car. When, however, the valve member is set to prevent the discharge of hot air into the interior of the car, the hot air by being discharged thro-ugh the openf ings 57 causes a decided cooling of the inte- Y pitched rior of the car for the reason that the exhaust ypipe B which ordinarily has a considerable heating effect upon the interior of the car because of its proximity to the floor and because of the radiation of heat from the pipe to the floor, is prevented by the jacket F. Conse uently in hot summer weather when the va ve 47 is set to prevent the heating of the interior of the vehicle, the air directing device functions to keep the interior of the Vehlcle cool by preventing the transmission of heat from the exhaust pipe to the floor ofv the vehicle.

I claim as my invention 1. An air receiving device adapted for use in connection with a rotary fan having pitched blades, said device having an L- shaped flaring mouth, one arm of which extends partly in rear of a portion of the path of movement of the fan blades and the other arm beyond an arc ofthe path of movement of the peripheral portions of said blades, said device converging to a reduced neck portion so as to bring together various currents of air discharged by said fan.

2. An air receiving device adapted for use in connection with a rotary fan having blades, said` device having an L shaped Haring mouth formed to receive air from the rear and a side of a fan, and to direct the air to a restricted discharge opening.

3. An air receiving device adaptedfor use in connection with a rotary fan having pitched blades, said device having an L- shaped flaring mouth one arm of which exten s partly in rear of the path of movement of the kfan blades and the other arm beyond an arc of the path of movement of the peripheral portions of said blades, said device extending from its mouth rearwardly and somewhat along the said arc in the direction of travel of the blades over said mouth and converging to a restricted discharge opening.

4. An air receiving device adapted for use i in `connection with a rotary fan having pitched blades, said device comprising a collecting shell having an open face of smaller area than the area covered by the moving blades and disposed at the rear of the blades and laterally of the fan axis adjacent the outer ends of the blades as the blades move past the shell, said shell having a portion of its wall surrounding the open face extending forwardly ofl the path of rotation of said blades to collect and direct into said shell a dially from the axis of rotation of said blades, as well as a portion of the rearwardly displaced air.

5. An air receiving device adapted for use in connection with a rotary fan having pitched blades, said device comprising a collecting shell having an open face of smaller area 'than the area covered by the moving blades and disposed at the rear of the blades and laterally of the fan axis adjacent the outer ends of the blades as the blades move past the shell, said shell having a portion of its wall surrounding the open face extending forwardly of the path of rotation of said blades and then flanged towards the axis of rotation of said blades to form a cup like section of the shell at the ends of the blades to collect and direct into said shell a portion ofthe air thrown somewhat radially by said blades as well as a portion of the rearwardly displaced air.

6. An air receiving device for use in connection with a rotary fan having pitched blades, comprising said fan, a funnel shaped shell in the rear of said fan and having its large end open and disposed adjacent and forwardly partially past and facing the outer ends of the blades during a portion of their travel in rotation in such a position as to receive a portion of the air displaced somewhat radially and also rearwardly by the y blades,`in an angular portion of their travel and to escape the air displaced by the blades during the remainder of their'angular travel.

7 An air receiving device for use in connection with ka rotary fan having pitched blades, comprising a shell diverging from a restricted discharge orifice tov form an open somewhat L-shaped receiving mouth whereby when saidfopen mouth is disposed at the rear of and facing said blades with an arm of the L extending forwardly somewhat beyond the ends of the blades when passing, said shell will collect air displaced both rearwardly and somewhat radially from said blades.

, LUCIEN L. HAAS. 

